I would
call the manufacturer. Seems like they have a physical presence here in the United States so you should be able to get someone on the phone. I'm not sure how good their support is because I've never heard of them before, but if you're seeing it
roll through several units it's likely they will be familiar with the problem. If they say a new
LED driver is $50 or $200, you would have to decide if it's worth it to you to repair or replace with someone else's product knowing you're likely going to have a recurring issue on all of your other fixtures as well.
Otherwise, bring the faulty units down and run them on a workbench for awhile. Open them up, visually inspect for obvious issues like leaky capacitors, make them angry and see if blowing a fan or a heat gun (or a hair dryer for that matter) on them makes any difference in how quickly or consistently they cycle. Could be something simple like the fan bearings have become gakked up and aren't moving as much air as they should be. Could be they've got
thermal paste between the
LED emitter package and the heatsink that needs to be reapplied.
Unfortunately what's most likely is that Mega cheaped on components and they are overdriving what those
power supplies can reasonably handle. The market for cheap
LED's is a race to the bottom with everyone in that market under pressure to deliver more lumens per emitter package. I am not optimistic if you find the source of the problem that you'll be able to remedy it for very long. It's probably a design flaw resulting from an effort to score more lumens on a cut sheet.
